nitrous question for a buddy of mine

[dbmx66]

i am asking this question for a buddy of mine who wants to runner a smaller shot of nitrous.

he has a 350 bored .30 over, with and eagle street/ strip rotating assembly, the crank is cast steel, keith black pistons, aluminum heads, 200cc with 2.02/ 1.60 valves with bronze guides, comp extreme energy .507/.510 cam flat tappet, roller rockers, edlbrock super victor, with a 670 holley carb.

it is a freshly rebuilt engine with 0 miles at the moment. he wants to know how much nitrous can this motor handle.

thanks david

[swb85]

Forged or cast pistons? Ring gap? I personally wouldn't spray more than 150 on a cast crank even with good pistons/rods/rings. If it's got cast pistons and tight ring gaps, she won't handle much if you want it to last very long.

[dbmx66]

i think he sed there hyperpurectic or however you spell that

[swb85]

Originally Posted by dbmx66

i think he sed there hyperpurectic or however you spell that

If so, then special attention needs paid to the ring gaps. If you gap them to n/a specs and spray it, you're gonna lift ring lands quick. With proper ring gaps, I'd spray up to 125 (properly tuned) on that motor.

[dbmx66]

Originally Posted by swb85

If so, then special attention needs paid to the ring gaps. If you gap them to n/a specs and spray it, you're gonna lift ring lands quick. With proper ring gaps, I'd spray up to 125 (properly tuned) on that motor.

okay thanks ill let him know

[chris mc bride]

I agree 100%.Problem is common motor was built then the nitrous idea hit. Its always better when you build it to be run with nitrous. personaly I always build my personal motors like they are inteded to be run with nitrous.This way Im safer and with me I know theres always a chance.
Tell your buddy hes better off keeping it at 100 hp or less shot IMO.

[dbmx66]

Originally Posted by chris mc bride

I agree 100%.Problem is common motor was built then the nitrous idea hit. Its always better when you build it to be run with nitrous. personaly I always build my personal motors like they are inteded to be run with nitrous.This way Im safer and with me I know theres always a chance.
Tell your buddy hes better off keeping it at 100 hp or less shot IMO.

you exactly right, he built it up to be a mild engine. and then he had the idea to run nitrous haha

[nomrlz]

cast crank and hyper pistons will take 100hp.
if you go to 150hp you need to make sure to pull 6-8 degrees of timing and make sure the fuel supply is adequate. those pistons don't take alot of heat.

that said. i've been spraying a 150 shot to my LT1 roadmaster wagon for several years and it comes with hypereutectic pistons.

[cableguy0]

He best 100% be sure the ring gaps are correct on those keith black pistons or he will be sweeping parts up. Do a google search about Keith black pistons. They are super sensitive to proper ring gap. I would have personally used a different piston but hes got what hes got already.

[hotrod 80]

Originally Posted by nomrlz

cast crank and hyper pistons will take 100hp.
if you go to 150hp you need to make sure to pull 6-8 degrees of timing and make sure the fuel supply is adequate. those pistons don't take alot of heat.

that said. i've been spraying a 150 shot to my LT1 roadmaster wagon for several years and it comes with hypereutectic pistons.

Your Roadmaster LT1 comes with Mahle pistons not Keith Black . They will take the spray .

For your buddies motor i would put a sniper 100-150 or powershot 125 kit on it . They have fixed jet sizes and all he has to do it maintain bottle pressure , ensure proper timing and fuel pressure . Also the motor needs some miles on it . The more breakin miles the wider the ring gap will get . Without knowing the ring gap , i would for sure do a good break in and not spray it til it had say 3-5000 miles on it .

[dbmx66]

Originally Posted by hotrod 80

Your Roadmaster LT1 comes with Mahle pistons not Keith Black . They will take the spray .

For your buddies motor i would put a sniper 100-150 or powershot 125 kit on it . They have fixed jet sizes and all he has to do it maintain bottle pressure , ensure proper timing and fuel pressure . Also the motor needs some miles on it . The more breakin miles the wider the ring gap will get . Without knowing the ring gap , i would for sure do a good break in and not spray it til it had say 3-5000 miles on it .

i think hes getting an edlebrock kit than go be adjusted from 50-100 or 50-150, i forget, ether from what you guys are saying, he should be fine with that. and by they way the engine was built and the rings were ground by a professional drag racer whos been building hes own engines for 30 plus years. so the motor is going to be a reliable motor.